code: def test_broadcast_when_sc_none(self):
      # SPARK-39029 : Test case to improve test coverage of broadcast.py
      # It tests the case when SparkContext is none and Broadcast is called at executor
      conf = SparkConf()
      conf.setMaster("local-cluster[2,1,1024]")
      self.sc = SparkContext(conf=conf)
      bs = self.sc.broadcast([10])
      bs_sc_none = Broadcast(sc=None, path=bs._path)
      self.assertEqual(bs_sc_none.value, [10])
  
imports: import os
  import pickle
  import random
  import time
  import tempfile
  import unittest
  from py4j.protocol import Py4JJavaError
  from pyspark import SparkConf, SparkContext, Broadcast
  from pyspark.java_gateway import launch_gateway
  from pyspark.serializers import ChunkedStream
  from pyspark.sql import SparkSession, Row
label_desc: Use image node_id 10 for calling the BroadcastTest obj's underlying member method code with example usage: obj.test_broadcast_when_sc_none() without return types